question on dropping my exhaust....

[bell]

the exhaust manifold nuts/studs are pretty rusted where they mount to the heads and i want to drop my exhaust, if these strip out/break what am i going to need to do to replace the studs?
i want to have everything onhand before i go at it.
thanks in advance guys...........and happy new year

[rfuerst911sc]

I think the trick here is not to break any,easier said then done.I replaced the exhaust on a 1974-911S that I owned a couple of years ago and everything was rusted,I sprayed each of the nuts 2 times a day for a week with PB Blaster,then I started removing them slowly,tapping them with a hammer to loosen them up,this worked for about half of them,the other half I heated with my oxy/acetelyne torch and they all came off without breaking.I then cleaned each one up with a wire brush and coated each stud with anti-seize compound,works like a champ.If you break them off,depending where they break,you may have to drill them out,heat them and grab with vise-grips etc.Good luck.

[Joe Bob]

Try not to break them in the first place......lot's of penetrating oil....NOT WD-40, use Kryoil or Liquid Wrench....let is soak, then turn a bit, tighten and soak again.....

If they do not break loose you will need some heat. Do a search, there are many threads on the subject.

Do not let them break, they will be a real pain. Once you get the heat exchangers off, you can double nut them and replace them.

[steveW]

I fully agree with both replies. When I put my headers on, I sprayed a penetrating fluid onto the studs for about a week before hand and undid themvery gently - not one broke!

[david c.]

I would also clean up the threads on the exposed studs after the removal of the h.e., before the reinstall (it's a metric pitch, of course, so if you don't have the proper die, be careful at the hardware store to make sure you've got the right one!)

Good luck

[bell]

thanks for the help guys.........so i guess i don't want to break any studs LOL
first application of penetrating oil went on an hour ago i can't wait to get my torpedo heater back from my father.........

[Jadams1]

Use oxygen/acetylene torches and heat the nuts until they are cherry red, then remove them while they are still glowing. That is the best insurance against breaking a stud.